Hydraulic brake



G. W. MASON HYDRAULIC BRAKE Filed Feb. 12. 1925 Patented Aug. 17, 1926. "1,596,286

1 UNITED STATES racraru' OFFICE.

enonea w. mm, or harm, moment.

7 mrmaaumc BRAKE.

Application filed February 12, 1925. Serial No. 8,600.

to provide a hydraulic brake device that is tainer next to the band 33 and upon said simple of construction and very cheap to plate 41 is a block 42. A bolt 43 with the manufacture. lock nut 44 is placed in the head of the At the present time hydraulic brakes member 40 and adapted to. press against the 60 either have a piston and piston housing or block 42 so that by turning the bolt 43 in a fluid chamber attached to each brake so one direction, pressure will be placed on the that the pressure of the fluid may be explate 41, thereby forcingthe band 33 tobcnd erted on the braking mechanism. inwardly and by turning the bolt 43 in the It is the primary object of my invention as at. 23 A plate 41 is placed on the re- 10 It is therefore another object of my inopposite direction, the band 33 will be al- 65 vention to provide a fluid braking devicelowed to expand.

that does not require a piston on each brake Spaced within the band 33 are heavy faband one that will eliminate the attaching ric tubes 45 that are held in place by the of a number of parts to either the wheel flanged plates 46, which are secured to the or the brake housing. dust shield 24 by rivets 47. A fluid feed 7 With the above, and other objects, in view, pipe 48 with the T end 49 passes through my invention consists in the arrangement, the shield 24, as at 50. Placed on the ends combination and construction of the various of said T 49 by means of the nuts 51 parts of my improved device as described in are the pipe branches 52 and 53 that conthe specification, claimed in my claims and nect with the nipples 54 and 55 of the 75 I shown in the accompanying drawings, in tubes 45.

which: I Thus in the practical use of my improved Fig. 1 is a sectional view through a brake device, the brake drum 11 is free to move drum, on line 1-1 of-Fig. 2, showing, in with the wheel ,12 until pressure, applied in elevation, my improved device. a conventional manner, is placed on the fluid 80 Fig. 2 is a sectional view taken .on line that is in the piping 48, which forces the 2- -2 of Fig. 1. fluid to pass through the branches 52 and I have shown in the construction of my 53 into the tubes '45, with the result that the improved device a conventional hub 1 0 and flexible band 33 is forced to expand by the the conventional brake drum 11 secured to inflated tubes so that the liners 46 and 47 85 a conventional wheel 12 by means of the will bear against the inner periphery of the bolts 13 and the nuts 14. A shaft 15 havdrum 11, thereby-stopping the wheel. ing the housing 16 is made secure to the hub It will be noted that the wide; relat vely 10 by means of the drive shaft nut 17 and flat construction of the tube 45, with the the hub 10. -Secured to the housing 16 is the fluid space therein, provides for well d1 the drive shaft bearing retainer 20 that has tributed braking action.-

the shaft felt retainer 21 with the felt I desire it to be understood that with cerwasher 22 therein fastened thereto. tain combinations of materlals that por- A hearing cap23- and the dust shield 24 tion of the band 33, between the tube and 95 are secured to the retainer 20 b the bolts the linings 34 and 35 may be eliminated, 26, the washers 28 and the nuts A bearand the lining fixed directly to the tube by ing 29 is held on the shaft 15 by means adhesion, or otherwise. 1 of the adapter 31 with the flangedend 60, It is obvious that various changes may be 0 45 the shank 32 on the shaft-15, the cap 23 made in the arrangement, combination an and the retainer 20. construction'of the various parts of my 1m- A flexible spring brake band 33 having proved device without departing from the the customary liners-34 and 35 on its pespirit of my invention, and it is my intenriphery is provided on the inside of the drum tion to cover by my claims such changes as 5 0 11. The band 33 is held in normally remay be reasonably included within the scope tracted position by a spring 36 that has its thereof.

ends 37 and 38 secured to the eye plates 39, What I claim is: V 3

which are placed on the ends of the band 33. 1. In combination; abrake drum, a flexlhe brake band adjustment consists 0f;"a. ible brake band, fabric'tubes, means to hold U-shaped member 40 riveted to the band 33, said tubes in position on said band and 110 the hub key 18. A hub cap 19 is placed on correspondingly wide and flat formation of I 2 aseaeee means to inflate said tubes with liquid there- 5.. In combination, a brake drum, a dust by expanding said band. shield for said drum, flanged slates secured 2. In combination, a brake drum, a flexito the inner side of said shiel flat flexible ble brake band, fabric tubes, flanged plates fabric tubes having brake liners on one side holding said tubes in position on said band, thereof held in position around the inner fluid feed pipes leading to said tubes, Whereperiphery of said drum by said plates, and by pressure on the liquid in said pipes will means to inflate said tubes with liquid, inflate said tubes to expand said band. thereby forcing the said liners to come in In combination, a brake drum, a flexicontact with said drums. ble brake band, fabric tubes, means to hold 6. In combination, a brake drum, a dust said tubes on said band, fluid pipes leading shield for said drum, flanged plates secured to said tubes whereby pressure on the liqto the inner side of said shield, relatively 1nd 111 said pipes will inflate said tubes to flat flexible fabric tubes, having relatively expand said band and means, consisting of flat fluid spaces therein, held in position a compression spring secured to the ends of around the inner periphery of said drum said band, to contract the same when presby said plates, brake liners on one side of sure on the is released. said tubes, and fluid feed pipes leading to 4 In combination, a brake drum, flat said tubes, and whereby pressure on .the liqflexible fabric tubes having brake liners on uid in said pipes will inflate said tubes and one side thereof,'means to hold said tubes force the liners to come in contact with said in posltion around the inner periphery of drum, said flat tube forcing the liquid to said drum and means to inflate said tubes return to its original position when pres- With liquid, thereby forcing said liners to sure is released. come in contact with said drum. GEORGE MASON. 

